Camera optical lens including seven lenses of ++−+−+−, ++−+++− or ++−−−+− refractive powers

ABSTRACT

The present disclosure relates to an optical lens and discloses a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The camera optical lens satisfies following conditions: 1.51≤f1/f≤2.50; 1.70≤n1≤2.20; −2.00≤f3/f4≤2.00; 2.50≤(R13+R14)/(R13−R14)≤10.01; and 1.70≤n7≤2.20; where f, f1, f3 f4 denote a focal length of the camera optical lens, a focal length of the first lens, a focal length of the third lens, a focal length of the fourth lens respectively; n2 denotes a refractive index of the second lens; n7 denotes a refractive index of the seventh lens; R13 and R14 denote a curvature radius of an object-side surface and a curvature radius of an image-side surface of the seventh lens respectively.

TECHNICAL FIELD

The present disclosure relates to the field of optical lens, particular,to a camera optical lens suitable for handheld devices, such as smartphones and digital cameras, and imaging devices, such as monitors or PClenses.

BACKGROUND

With the emergence of smart phones in recent years, the demand forminiature camera lens is increasing day by day, but in general thephotosensitive devices of camera lens are nothing more than ChargeCoupled Device (CCD) or Complementary Metal-Oxide Semiconductor Sensor(CMOS sensor), and as the progress of the semiconductor manufacturingtechnology makes the pixel size of the photosensitive devices becomesmaller, plus the current development trend of electronic productstowards better functions and thinner and smaller dimensions, miniaturecamera lens with good imaging quality therefore have become a mainstreamin the market. In order to obtain better imaging quality, the lens thatis traditionally equipped in mobile phone cameras adopts a three-pieceor four-piece lens structure. Also, with the development of technologyand the increase of the diverse demands of users, and as the pixel areaof photosensitive devices is becoming smaller and smaller and therequirement of the system on the imaging quality is improvingconstantly, the five-piece, six-piece and seven-piece lens structuregradually appear in lens designs. There is an urgent need for ultra-thinwide-angle camera lenses which with good optical characteristics andfully corrected aberration.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic diagram of a structure of a camera optical lensaccording to Embodiment 1 of the present disclosure.

FIG. 2 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 1.

FIG. 3 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 1.

FIG. 4 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 1.

FIG. 5 is a schematic diagram of a structure of a camera optical lensaccording to Embodiment 2 of the present disclosure.

FIG. 6 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 5.

FIG. 7 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 5.

FIG. 8 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 5.

FIG. 9 is a schematic diagram of a structure of a camera optical lensaccording to Embodiment 3 of the present disclosure.

FIG. 10 is a schematic diagram of a longitudinal aberration of thecamera optical lens shown in FIG. 9.

FIG. 11 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 9.

FIG. 12 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 9.

DETAILED DESCRIPTION OF EMBODIMENTS

To make the objects, technical solutions, and advantages of the presentdisclosure clearer, embodiments of the present disclosure are describedin detail with reference to accompanying drawings in the following. Aperson of ordinary skill in the art can understand that, in theembodiments of the present disclosure, many technical details areprovided to make readers better understand the present disclosure.However, even without these technical details and any changes andmodifications based on the following embodiments, technical solutionsrequired to be protected by the present disclosure can be implemented.

Embodiment 1

Referring to the accompanying drawings, the present disclosure providesa camera optical lens 10. FIG. 1 shows the camera optical lens 10 ofEmbodiment 1 of the present disclosure, the camera optical lens 10includes seven lenses. Specifically, the camera optical lens 10includes, from an object side to an image side: an aperture S1, a firstlens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifthlens L5, a sixth lens L6 and a seventh lens L7. An optical element suchas an optical filter GF can be arranged between the seventh lens L7 andan image surface Si.

The first lens L1 is made of glass material, the second lens L2, thethird lens L3, the fourth lens L4, the fifth lens L5 and the sixth lensL6 are all made of plastic material, the seventh lens L7 is made ofglass material.

Here, a focal length of the camera optical lens 10 is defined as f, anda focal length of the first lens L1 is defined as f1. The camera opticallens 10 satisfies a condition of 1.51≤f1/f≤2.50, which specifies thatthe first lens L1 has a positive refractive power. If beyond the lowerspecified value, though it is beneficial for an ultra-thin lens, thefirst lens L1 has a relative strong positive refractive power and isdifficult for correcting aberration, and is not beneficial forwide-angle development of a lens. On the contrary, if beyond the upperspecified value, the first lens L1 has a relative weak positiverefractive power, which is difficult for ultra-thin development of alens.

A refractive index of the first lens L1 is defined as n1, and1.70≤n1≤2.20, which specifies the refractive index of the first lens L1.Within this range, it is beneficial for the development into thedirection of ultra-thin lenses, as well as correcting aberration of theoptical system. Preferably, the camera optical lens 10 further satisfiesa condition of 1.71≤n1≤2.16.

A focal length of the third lens L3 is defined as f3, a focal length ofthe fourth length is defined as f4, and −2.00≤f3/f4≤2.00, whichspecifies a ratio between the focal length f3 of the third lens L3 andthe focal length f4 of the fourth length L4. This can effectively reducesensitiveness of the camera optical lenses, and further improve imagingquality.

A curvature radius of an object side surface of the first lens L7 isdefined as R13, a curvature radius of an image side surface of the firstlens L7 is defined as R14, and the camera optical lens 10 furthersatisfies a condition of 2.50≤(R13+R14)/(R13−R14)≤10.01, which specifiesa shape of the seventh lens L7. Within this range, it is beneficial forthe development into the direction of ultra-thin lenses, as well ascorrecting aberration of the optical system.

A refractive index of the seventh lens L7 is defined as n7, and1.70≤n1≤2.20, which specifies the refractive index of the seventh lensL7. Within this range, it is beneficial for the development into thedirection of ultra-thin lenses, as well as correcting aberration of theoptical system. Preferably, the camera optical lens 10 further satisfiesa condition of 1.71≤n7≤2.16.

When the focal length f of the camera optical lens, the focal length f1of the first lens L1, the focal length f3 of the third lens L3, thefocal length f4 of the fourth lens L4, the refractive index n1 of thefirst lens L1, the refractive index n7 of the seventh lens L7, thecurvature radius R13 of the object-side surface of the seventh lens L7,and the curvature radius R14 of the image-side surface of the seventhlens L7 all satisfy the above conditions, the camera optical lens 10 hasan advantage of high performance and satisfies a design requirement oflow TTL. Herein, TTL is a total optical length from the object sidesurface of the first lens L1 to the image surface Si of the cameraoptical lens along an optical axis.

In an embodiment, the object-side surface of the first lens L1 is convexin a paraxial region, the image-side surface of the first lens L1 isconcave in the paraxial region, and the first lens L1 has a positiverefractive power.

A curvature radius R1 of an object side surface of the first lens L1 anda curvature radius R2 of an image side surface of the first lens L1satisfy a condition of −12.49≤(R1+R2)/(R1−R2)≤−1.62, which reasonablycontrols a shape of the first lens, so that the first lens mayeffectively correct system spherical aberration. Preferably, the cameraoptical lens 10 further satisfies a condition of−7.81≤(R1+R2)/(R1−R2)≤−2.03.

An on-axis thickness of the first lens L1 is defined as d1, and thecamera optical lens 10 further satisfies a condition of0.03≤d1/TTL≤0.11. This can facilitate achieving ultra-thin lenses.Preferably, the camera optical lens 10 further satisfies a condition of0.05≤d1/TTL≤0.09.

In an embodiment, an object-side surface of the second lens L2 is convexin the paraxial region, and the second lens L2 has a positive refractivepower.

The focal length of the second lens L2 is defined as f2, and the cameraoptical lens 10 further satisfies a condition of 0.87≤f2/f≤9.46. Bycontrolling a positive refractive power of the second lens L2 within areasonable range, correction of the aberration of the optical system canbe facilitated. Preferably, the camera optical lens 10 further satisfiesa condition of 1.39≤f2/f≤7.57.

A curvature radius of the object-side surface of the second lens L2 isdefined as R3, a curvature radius of the image-side surface of thesecond lens L2 is defined as R4, and the camera optical lens 10 furthersatisfies a condition of −4.01≤(R3+R4)/(R3−R4)≤−0.21, which specifies ashape of the second lens L2. Within this range, a development towardsultra-thin and wide-angle lenses would facilitate correcting the problemof an on-axis aberration. Preferably, the camera optical lens 10 furthersatisfies a condition of −2.51≤(R3+R4)/(R3−R4)≤−0.17.

An on-axis thickness of the second lens L2 is defined as d3, and thecamera optical lens 10 further satisfies a condition of0.05≤d3/TTL≤0.19, which is beneficial for ultra-thinning of the opticalsystem. Preferably, the camera optical lens 10 further satisfies acondition of 0.08≤d3/TTL≤0.15.

In an embodiment, the third lens L3 has a negative refractive power.

A focal length of the third lens L3 is defined as f3, and the cameraoptical lens 10 further satisfies a condition of −12.41≤f3/f≤−1.30. Anappropriate distribution of the refractive power leads to a betterimaging quality and a lower sensitivity. Preferably, the camera opticallens 10 further satisfies a condition of −7.75≤f3/f≤−1.63.

A curvature radius of the object-side surface of the third lens L3 isdefined as R5, a curvature radius of the image-side surface of the thirdlens L3 is defined as R6, and the camera optical lens 10 furthersatisfies a condition of −18.01≤(R5+R6)/(R5−R6)≤5.53. This caneffectively control a shape of the third lens L3, thereby facilitatingshaping of the third lens and avoiding bad shaping and generation ofstress due to an the overly large surface curvature of the third lensL3. Preferably, the camera optical lens 10 further satisfies a conditionof −11.26≤(R5+R6)/(R5−R6)≤4.42.

An on-axis thickness of the third lens L3 is defined as d5, and thecamera optical lens 10 further satisfies a condition of0.02≤d5/TTL≤0.07. This can facilitate achieving ultra-thin lenses.Preferably, the camera optical lens 10 further satisfies a condition of0.03≤d5/TTL≤0.06.

In an embodiment, the fourth lens L4 comprises an object-side surfacebeing convex in a paraxial region and has a refractive power.

A focal length of the fourth lens L4 is defined as f4, and the cameraoptical lens 10 further satisfies a condition of −6.21≤f4/f≤9.07. Theappropriate distribution of refractive power makes it possible that thesystem has the better imaging quality and the lower sensitivity.Preferably, the camera optical lens 10 further satisfies a conditionfurther satisfies a condition of further satisfies a condition offurther satisfies a further satisfies a condition of −3.88≤f4/f≤7.25.

A curvature radius of the object-side surface of the fourth lens L4 isdefined as R7, a curvature radius of the image-side surface of thefourth lens L4 is defined as R8, and the camera optical lens 10 furthersatisfies a condition of −4.31≤(R7+R8)/(R7−R8)≤7.03, which specifies ashape of the fourth lens L4. Within this range, a development towardsultra-thin and wide-angle lens would facilitate correcting a problemlike an off-axis aberration. Preferably, the camera optical lens 10further satisfies a condition of −2.69≤(R7+R8)/(R7−R8)≤5.62.

An on-axis thickness of the fourth lens L4 is defined as d7, and thecamera optical lens 10 further satisfies a condition of0.03≤d7/TTL≤0.17. This can facilitate achieving ultra-thin lenses.Preferably, the camera optical lens 10 further satisfies a condition of0.05≤d7/TTL≤0.13.

In an embodiment, the fifth lens L5 comprises an object-side surfacebeing concave in a paraxial region and an image-side surface beingconvex in the paraxial region, and has a refractive power.

A focal length of the fifth lens L5 is defined as f5, and the cameraoptical lens 10 further satisfies a condition of −5.03≤f5/f≤13.07, whichcan effectively make a light angle of the camera lens gentle and reducean tolerance sensitivity. Preferably, the camera optical lens 10 furthersatisfies a condition of −3.14≤f5/f≤10.45.

A curvature radius of the object-side surface of the fifth lens L5 isdefined as R9, a curvature radius of the image-side surface of the fifthlens L5 is defined as R10, and the camera optical lens 10 furthersatisfies a condition of 11.35≤(R9+R10)/(R9−R10)≤23.88, which specifiesa shape of the fifth lens L5. Within this range, a development towardsultra-thin and wide-angle lenses can facilitate correcting a problem ofthe off-axis aberration. Preferably, the camera optical lens 10 furthersatisfies a condition of −22.57≤(R9+R10)/(R9−R10)≤−3.65.

An on-axis thickness of the fifth lens L5 is defined as d9, and thecamera optical lens 10 further satisfies a condition of0.02≤d9/TTL≤0.12. This can facilitate achieving ultra-thin lenses.Preferably, the camera optical lens 10 further satisfies a condition of0.04≤d9/TTL≤0.10.

In an embodiment, an object-side surface of the sixth lens L6 is convexin the paraxial region, an image-side surface of the sixth lens L6 isconcave in the paraxial region, and the sixth lens L6 has a positiverefractive power.

A focal length of the sixth lens L6 is defined as f6, and the cameraoptical lens 10 further satisfies a condition of 0.17≤f6/f≤4.46. Theappropriate distribution of refractive power makes it possible that thesystem has the better imaging quality and lower sensitivity. Preferably,the camera optical lens 10 further satisfies a condition of0.28≤f6/f≤3.57.

A curvature radius of the object-side surface of the sixth lens L6 isdefined as R11, a curvature radius of the image-side surface of thesixth lens L6 is defined as R12, and the camera optical lens 10 furthersatisfies a condition of −13.67≤(R11+R12)/(R11−R12)≤−2.10, whichspecifies a shape of the sixth lens L6. Within this range, a developmenttowards ultra-thin and wide-angle lenses would facilitate correcting aproblem like aberration of the off-axis aberration. Preferably, thecamera optical lens 10 further satisfies a condition of−8.55≤(R11+R12)/(R11−R12)≤−2.62.

An on-axis thickness of the sixth lens L6 is defined as d11, and thecamera optical lens 10 further satisfies a condition of0.04≤d11/TTL≤0.15. This can facilitate achieving ultra-thin lenses.Preferably, the camera optical lens 10 further satisfies a condition of0.07≤d11/TTL≤0.12.

In an embodiment, an object-side surface of the seventh lens L7 isconvex in the paraxial region, an image-side surface of the seventh lensL7 is concave in the paraxial region, and the seventh lens L7 has anegative refractive power.

A focal length of seventh lens L7 is defined as f7, and the cameraoptical lens 10 further satisfies a condition of −20.97≤f7/f≤−0.90. Theappropriate distribution of refractive power makes it possible that thesystem has the better imaging quality and lower sensitivity. Preferably,the camera optical lens 10 further satisfies a condition of−13.10≤f7/f≤−1.12.

An on-axis thickness of the seventh lens L7 is d13, and the cameraoptical lens 10 further satisfies a condition of 0.06≤d13/TTL≤0.20,which is beneficial for achieving ultra-thin lenses. which is beneficialfor achieving ultra-thin lenses. Preferably, the camera optical lens 10further satisfies a condition of 0.10≤d13/TTL≤0.16.

In an embodiment, the total optical length TTL of the camera opticallens 10 is less than or equal to 5.99 mm, which is beneficial forachieving ultra-thin lenses. Preferably, the total optical length TTL ofthe camera optical lens 10 is less than or equal to 5.72 mm.

In an embodiment, an F number of the camera optical lens 10 is less thanor equal to 1.65. The camera optical lens has a large aperture and abetter imaging performance. Preferably, the F number of the cameraoptical lens 10 is less than or equal to 1.62.

With such designs, the total optical length TTL of the camera opticallens 10 can be made as short as possible, thus the miniaturizationcharacteristics can be maintained.

In the following, examples will be used to describe the camera opticallens 10 of the present disclosure. The symbols recorded in each examplewill be described as follows. The focal length, on-axis distance,curvature radius, on-axis thickness, inflexion point position, andarrest point position are all in units of mm.

TTL: Optical length (the total optical length from the object sidesurface of the first lens to the image surface of the camera opticallens along the optical axis) in mm.

Preferably, inflexion points and/or arrest points can be arranged on theobject-side surface and/or the image-side surface of the lens, so as tosatisfy the demand for high quality imaging. The description below canbe referred for specific implementations.

The design data of the camera optical lens 10 in Embodiment 1 of thepresent disclosure are shown in Table 1 and Table 2.

TABLE 1 R d nd νd S1 ∞ d0 = −0.280 R1 2.407 d1 =   0.348 nd1 1.7114 ν130.23 R2 5.762 d2 =   0.070 R3 8.550 d3 =   0.496 nd2 1.5473 ν2 55.81 R425.577 d4 =   0.082 R5 4.666 d5 =   0.186 nd3 1.6464 ν3 23.54 R6 2.291d6 =   0.169 R7 6.766 d7 =   0.578 nd4 1.5473 ν4 55.81 R8 −2.692 d8 =  0.343 R9 −1.234 d9 =   0.419 nd5 1.6464 ν5 23.54 R10 −1.762 d10 =  0.049 R11 2.480 d11 =   0.473 nd6 1.5473 ν6 55.81 R12 4.385 d12 =  0.414 R13 5.372 d13 =   0.655 nd7 1.7114 ν7 30.23 R14 2.303 d14 =  0.559 R15 ∞ d15 =   0.210 ndg 1.5168 νg 64.17 R16 ∞ d16 =   0.143

In the table, meanings of various symbols will be described as follows.

S1: aperture;

R: curvature radius of an optical surface, a central curvature radiusfor a lens;

R1: curvature radius of the object-side surface of the first lens L1;

R2: curvature radius of the image-side surface of the first lens L1;

R3: curvature radius of the object-side surface of the second lens L2;

R4: curvature radius of the image-side surface of the second lens L2;

R5: curvature radius of the object-side surface of the third lens L3;

R6: curvature radius of the image-side surface of the third lens L3;

R7: curvature radius of the object-side surface of the fourth lens L4;

R8: curvature radius of the image-side surface of the fourth lens L4;

R9: curvature radius of the object-side surface of the fifth lens L5;

R10: curvature radius of the image-side surface of the fifth lens L5;

R11: curvature radius of the object-side surface of the sixth lens L6;

R12: curvature radius of the image-side surface of the sixth lens L6;

R13: curvature radius of the object-side surface of the seventh lens L7;

R14: curvature radius of the image-side surface of the seventh lens L7;

R15: curvature radius of an object-side surface of the optical filterGF;

R16: curvature radius of an image-side surface of the optical filter GF;

d: on-axis thickness of a lens and an on-axis distance between lens;

d0: on-axis distance from the aperture S1 to the object-side surface ofthe first lens L1;

d1: on-axis thickness of the first lens L1;

d2: on-axis distance from the image-side surface of the first lens L1 tothe object-side surface of the second lens L2;

d3: on-axis thickness of the second lens L2;

d4: on-axis distance from the image-side surface of the second lens L2to the object-side surface of the third lens L3;

d5: on-axis thickness of the third lens L3;

d6: on-axis distance from the image-side surface of the third lens L3 tothe object-side surface of the fourth lens L4;

d7: on-axis thickness of the fourth lens L4;

d8: on-axis distance from the image-side surface of the fourth lens L4to the object-side surface of the fifth lens L5;

d9: on-axis thickness of the fifth lens L5;

d10: on-axis distance from the image-side surface of the fifth lens L5to the object-side surface of the sixth lens L6;

d11: on-axis thickness of the sixth lens L6;

d12: on-axis distance from the image-side surface of the sixth lens L6to the object-side surface of the seventh lens L7;

d13: on-axis thickness of the seventh lens L7;

d14: on-axis distance from the image-side surface of the seventh lens L7to the object-side surface of the optical filter GF;

d15: on-axis thickness of the optical filter GF;

d16: on-axis distance from the image-side surface to the image surfaceof the optical filter GF;

nd: refractive index of the d line;

nd1: refractive index of the d line of the first lens L1;

nd2: refractive index of the d line of the second lens L2;

nd3: refractive index of the d line of the third lens L3;

nd4: refractive index of the d line of the fourth lens L4;

nd5: refractive index of the d line of the fifth lens L5;

nd6: refractive index of the d line of the sixth lens L6;

nd7: refractive index of the d line of the seventh lens L7;

ndg: refractive index of the d line of the optical filter GF;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

v6: abbe number of the sixth lens L6;

v7: abbe number of the seventh lens L7;

vg: abbe number of the optical filter GF.

Table 2 shows aspherical surface data of the camera optical lens 10 inEmbodiment 1 of the present disclosure.

TABLE 2 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10R1 1.3089E+00 −8.2670E−03 1.5681E−02 −7.2033E−02 1.0349E−01 R21.9043E+01  3.1918E−02 −1.0432E−02   7.0361E−03 1.4609E−03 R3 2.5634E+01 7.1505E−02 3.0142E−03 −8.8426E−03 −2.5558E−02  R4 1.9302E+02−6.1988E−03 2.0392E−02 −1.5721E−01 1.2594E−01 R5 −3.3535E+01 −2.3028E−01 2.0135E−01 −2.9325E−01 2.9162E−01 R6 2.0595E+00 −2.7963E−012.3822E−01 −3.7028E−01 4.6391E−01 R7 1.8437E+01 −3.4826E−02 6.9020E−03−4.3935E−02 2.5057E−02 R8 −1.2661E−01  −1.9247E−02 5.4781E−02−9.4306E−02 4.3746E−02 R9 −2.1822E−01   1.0245E−01 −4.5448E−02 −4.7081E−02 1.4813E−01 R10 2.0931E−01  4.1244E−03 −6.2215E−02  8.2296E−02 −3.6123E−02  R11 −9.3439E+00   3.8842E−02 −1.0447E−01  7.0041E−02 −2.9130E−02  R12 −2.8528E−01   1.3116E−02 −3.4590E−02  9.0911E−03 −9.3686E−04  R13 1.6708E+00 −2.1205E−01 7.9623E−02−1.4971E−02 1.4038E−03 R14 −6.1198E−01  −1.9173E−01 8.2299E−02−2.7325E−02 6.0873E−03 Aspheric surface coefficients A12 A14 A16 A18 A20R1 −6.9380E−02  2.0587E−02 −4.5100E−04  −1.4485E−03   3.2076E−04 R2 8.2053E−04 −7.6654E−04 −4.8652E−04  −5.0123E−04   3.9254E−04 R3 2.9636E−02 −3.8255E−03 −6.3588E−03  2.5492E−03 −1.3422E−04 R4−4.0588E−02  1.2588E−02 1.3793E−03 2.0053E−04 −1.4762E−03 R5 −1.4299E−01 2.4778E−02 2.1563E−02 −1.3449E−02   1.6760E−03 R6 −3.6184E−01 1.4997E−01 −2.5284E−02  2.3413E−03 −1.4365E−03 R7 −1.7599E−02 5.1154E−03 3.0086E−03 1.7533E−03 −1.4532E−03 R8  2.3963E−02 −1.4610E−021.1961E−03 −2.1387E−03   7.8201E−04 R9 −7.1098E−02  6.3256E−036.5773E−04 1.6071E−03 −6.1429E−04 R10  1.1571E−02 −1.8707E−03−7.5700E−05  −1.3611E−04   7.6986E−05 R11  5.6884E−03 −5.5532E−043.7780E−05 1.7300E−05 −1.1261E−05 R12 −8.0099E−05 −8.5938E−06 2.8108E−061.0949E−06 −9.8371E−08 R13 −3.6369E−05 −3.6961E−06 3.3894E−07 3.2998E−09−2.4421E−09 R14 −8.3202E−04  6.5241E−05 −2.8040E−06  7.9145E−08−2.1463E−09

Here, K is a conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18,A20 are aspheric surface coefficients.

IH: Image heighty=(x ² /R)/[1+{1−(k+1)(x ² /R ²)}^(1/2)]+A4x ⁴ +A6x ⁶ +A8x ⁸ +A10x ¹⁰+A12x ¹² +A14x ¹⁴ +A16x ¹⁶ +A18x ¹⁸ +A20x ²⁰  (1)

For convenience, an aspheric surface of each lens surface uses theaspheric surfaces shown in the above formula (1). However, the presentdisclosure is not limited to the aspherical polynomials form shown inthe formula (1).

Table 3 and Table 4 show design data of inflexion points and arrestpoints of the camera optical lens 10 according to Embodiment 1 of thepresent disclosure. P1R1 and P1R2 represent the object-side surface andthe image-side surface of the first lens L1, P2R1 and P2R2 represent theobject-side surface and the image-side surface of the second lens L2,P3R1 and P3R2 represent the object-side surface and the image-sidesurface of the third lens L3, P4R1 and P4R2 represent the object-sidesurface and the image-side surface of the fourth lens L4, P5R1 and P5R2represent the object-side surface and the image-side surface of thefifth lens L5, P6R1 and P6R2 represent the object-side surface and theimage-side surface of the sixth lens L6, P7R1 and P7R2 represent theobject-side surface and the image-side surface of the seventh lens L7.The data in the column named “inflexion point position” refer tovertical distances from inflexion points arranged on each lens surfaceto the optic axis of the camera optical lens 10. The data in the columnnamed “arrest point position” refer to vertical distances from arrestpoints arranged on each lens surface to the optical axis of the cameraoptical lens 10.

TABLE 3 Number(s) of Inflexion point Inflexion point inflexion pointsposition 1 position 2 P1R1 0 P1R2 0 P2R1 0 P2R2 2 0.445 1.015 P3R1 20.285 0.965 P3R2 2 0.475 0.995 P4R1 2 0.585 1.125 P4R2 2 0.995 1.165P5R1 2 0.945 1.185 P5R2 1 1.145 P6R1 1 0.705 P6R2 2 0.835 1.975 P7R1 20.285 1.515 P7R2 2 0.505 2.605

TABLE 4 Number(s) of Arrest point Arrest point arrest points position 1position 2 P1R1 0 P1R2 0 P2R1 0 P2R2 2 0.625 1.165 P3R1 2 0.505 1.145P3R2 0 P4R1 1 0.865 P4R2 0 P5R1 0 P5R2 0 P6R1 1 1.145 P6R2 1 1.285 P7R12 0.505 2.365 P7R2 1 1.025

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateralcolor with wavelengths of 436 nm, 486 nm, 546 nm, 588 nm and 656 nmafter passing the camera optical lens 10 according to Embodiment 1,respectively. FIG. 4 illustrates a field curvature and a distortion witha wavelength of 546 nm after passing the camera optical lens 10according to Embodiment 1. A field curvature Sin FIG. 4 is a fieldcurvature in a sagittal direction, and T is a field curvature in atangential direction.

Table 13 in the following shows various values of Embodiments 1, 2, 3and values corresponding to parameters which are specified in the aboveconditions.

As shown in Table 13, Embodiment 1 satisfies the above conditions.

In this Embodiment, an entrance pupil diameter of the camera opticallens is 2.302 mm, an image height of 1.0H is 3.4 mm, an FOV (field ofview) in a diagonal direction is 84.59°. Thus, the camera optical lenshas a wide-angle and is ultra-thin. Its on-axis and off-axis aberrationsare fully corrected, thereby achieving excellent opticalcharacteristics.

Embodiment 2

Embodiment 2 is basically the same as Embodiment 1 and involves symbolshaving the same meanings as Embodiment 1, and only differencestherebetween will be described in the following.

Table 5 and Table 6 show design data of a camera optical lens 20 inEmbodiment 2 of the present disclosure.

TABLE 5 R d nd νd S1 ∞ d0 = −0.280 R1 2.572 d1 =   0.400 nd1 1.8099 ν140.89 R2 3.746 d2 =   0.164 R3 3.286 d3 =   0.674 nd2 1.5473 ν2 55.81 R419.820 d4 =   0.060 R5 4.547 d5 =   0.234 nd3 1.6464 ν3 23.54 R6 2.606d6 =   0.352 R7 8.655 d7 =   0.486 nd4 1.5473 ν4 55.81 R8 23.667 d8 =  0.152 R9 −3.807 d9 =   0.270 nd5 1.6464 ν5 23.54 R10 −3.357 d10 =  0.080 R11 2.066 d11 =   0.438 nd6 1.5473 ν6 55.81 R12 2.774 d12 =  0.446 R13 4.676 d13 =   0.632 nd7 1.8099 ν7 40.89 R14 2.144 d14 =  0.559 R15 ∞ d15 =   0.210 ndg 1.5168 νg 64.17 R16 ∞ d16 =   0.143

Table 6 shows aspherical surface data of each lens of the camera opticallens 20 in Embodiment 2 of the present disclosure.

TABLE 6 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10A12 R1 1.2698E−01 −2.8160E−02 3.9187E−02 −8.1393E−02 1.0020E−01−6.8411E−02 R2 5.5638E+00 −1.6163E−02 −2.8963E−02   2.1382E−023.0756E−03 −5.0859E−03 R3 −1.6611E+01   6.3602E−02 −2.6770E−02  1.3338E−02 −2.2985E−02   2.6216E−02 R4 1.1841E+02 −9.4953E−021.0334E−01 −1.6397E−01 1.2334E−01 −4.6554E−02 R5 2.6854E+00 −2.0673E−012.1617E−01 −2.9602E−01 2.8415E−01 −1.4975E−01 R6 3.0143E+00 −1.9555E−012.6606E−01 −4.0465E−01 4.6854E−01 −3.5487E−01 R7 −1.7876E+01 −7.3791E−02 7.8598E−02 −7.4818E−02 6.2151E−02 −1.5107E−02 R8−1.0000E+03  −1.7226E−01 1.1133E−01 −6.1518E−02 2.4681E−02  1.3243E−02R9 2.5352E+00  2.9157E−02 −1.7384E−02  −7.1003E−02 1.3193E−01−7.7332E−02 R10 9.5849E−01  5.7562E−02 −8.8080E−02   7.5873E−02−3.5744E−02   1.1751E−02 R11 −8.3602E+00   4.1946E−02 −9.2149E−02  5.7396E−02 −2.9910E−02   6.8034E−03 R12 −2.6515E+01   5.4217E−02−4.5572E−02   8.2957E−03 −4.7619E−04   2.9634E−05 R13 8.8544E−01−2.0613E−01 7.8938E−02 −1.4963E−02 1.4091E−03 −3.6734E−05 R14−6.0813E−01  −1.8555E−01 8.0776E−02 −2.7388E−02 6.0927E−03 −8.3100E−04Aspheric surface coefficients A14 A16 A18 A20 R1  2.2034E−02−1.7443E−04  −1.2165E−03 6.3806E−05 R2 −1.3155E−03 1.3968E−03 1.1755E−03 −7.2554E−04  R3 −6.0459E−03 −5.9692E−03   3.4717E−03−5.6433E−04  R4  1.0001E−02 −1.2931E−03  −1.8494E−05 4.2785E−05 R5 2.3230E−02 2.1857E−02 −1.2650E−02 2.0277E−03 R6  1.4971E−01−2.8082E−02   1.2401E−03 −3.4303E−04  R7 −1.0070E−02 −7.9721E−04  6.0022E−03 −1.8496E−03  R8 −1.6151E−02 3.9559E−03 −3.4277E−041.1294E−04 R9  1.4820E−02 2.6155E−03 −1.9717E−03 3.7694E−04 R10−1.9233E−03 4.0995E−05 −8.4608E−05 3.1236E−05 R11 −2.7564E−04 4.4620E−06−2.6116E−05 2.5958E−06 R12 −2.7060E−06 −2.5865E−07  −5.0245E−084.9095E−09 R13 −3.9297E−06 3.1288E−07  1.4108E−09 −1.6122E−09  R14 6.5339E−05 −2.7989E−06   7.7976E−08 −2.3389E−09 

Table 7 and table 8 show design data of inflexion points and arrestpoints of each lens of the camera optical lens 20 lens according toEmbodiment 2 of the present disclosure.

TABLE 7 Number(s) of Inflexion point Inflexion point Inflexion pointinflexion points position 1 position 2 position 3 P1R1 0 P1R2 0 P2R1 11.205 P2R2 2 0.235 1.265 P3R1 2 0.355 1.025 P3R2 0 P4R1 3 0.455 0.7551.065 P4R2 2 0.145 1.395 P5R1 3 1.015 1.115 1.395 P5R2 1 1.065 P6R1 10.715 P6R2 1 0.835 P7R1 3 0.315 1.455 2.355 P7R2 1 0.555

TABLE 8 Number of Arrest point Arrest point arrest points position 1position 1 P1R1 0 P1R2 0 P2R1 0 P2R2 1 0.415 P3R1 2 0.655 1.185 P3R2 0P4R1 1 1.215 P4R2 1 0.245 P5R1 0 P5R2 1 1.545 P6R1 1 1.135 P6R2 1 1.315P7R1 1 0.565 P7R2 1 1.165

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 436 nm, 486 nm, 546 nm, 588 nm and656 nm after passing the camera optical lens 20 according to Embodiment2. FIG. 8 illustrates a field curvature and a distortion of light with awavelength of 546 nm after passing the camera optical lens 20 accordingto Embodiment 2.

As shown in Table 13, Embodiment 2 satisfies the above conditions.

In an embodiment, an entrance pupil diameter of the camera optical lensis 2.55 mm, an image height of 1.0H is 3.4 mm, an FOV (field of view) inthe diagonal direction is 78.86°. Thus, the camera optical lens has awide-angle and is ultra-thin. Its on-axis and off-axis aberrations arefully corrected, thereby achieving excellent optical characteristics.

Embodiment 3

Embodiment 3 is basically the same as Embodiment 1 and involves symbolshaving the same meanings as Embodiment 1, and only differencestherebetween will be described in the following.

Table 9 and Table 10 show design data of a camera optical lens 30 inEmbodiment 3 of the present disclosure.

TABLE 9 R d nd νd S1 ∞ d0 = −0.280 R1 2.990 d1 =   0.322 nd1 2.1171 ν118.05 R2 4.130 d2 =   0.314 R3 7.456 d3 =   0.604 nd2 1.5473 ν2 55.81 R4−5.606 d4 =   0.199 R5 −2.182 d5 =   0.266 nd3 1.6464 ν3 23.54 R6 −2.727d6 =   0.316 R7 2.694 d7 =   0.356 nd4 1.5473 ν4 55.81 R8 1.746 d8 =  0.238 R9 −0.672 d9 =   0.265 nd5 1.6464 ν5 23.54 R10 −2.546 d10 =  0.051 R11 0.449 d11 =   0.527 nd6 1.5473 ν6 55.81 R12 0.867 d12 =  0.483 R13 5.008 d13 =   0.740 nd7 2.1171 ν7 18.05 R14 4.098 d14 =  0.412 R15 ∞ d15 =   0.210 ndg 1.5168 νg 64.17 R16 d16 =   0.143

Table 10 shows aspherical surface data of each lens of the cameraoptical lens 30 in Embodiment 3 of the present disclosure.

TABLE 10 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10A12 R1  4.1546E+00  2.6266E−02 1.1285E−01 −1.0054E−01 8.2774E−02−8.5936E−02 R2  1.6044E+01  1.8003E−01 4.2968E−02  6.0720E−02−1.5671E−01  −5.8762E−02 R3  2.0566E+01  1.9696E−01 −2.5616E−01  1.5124E−01 −3.6390E−02  −1.0821E−01 R4  1.8483E+01 −3.1295E−015.8849E−01 −7.8534E−01 1.2845E−01  3.1792E−01 R5  1.9804E+00 −2.7052E−012.0795E−01 −2.0061E−02 2.2079E−01 −1.9788E−01 R6 −2.8903E+02 −5.2155E−015.1108E−01 −1.7353E−01 3.1569E−01 −4.6053E−01 R7 −3.8262E+01 −3.5911E−028.3739E−02 −1.2843E−01 2.0863E−02  1.5563E−02 R8 −1.0805E+02 −5.0178E−028.7451E−02 −9.5199E−02 1.4968E−02  1.7161E−02 R9 −4.9144E+01  5.5078E−02−3.5200E−02  −7.0311E−02 1.2901E−01 −7.5351E−02 R10 −4.1152E+01 4.1005E−02 −9.1605E−02   8.2093E−02 −3.5559E−02   1.1166E−02 R11−9.7802E+00  9.7783E−02 −1.0696E−01   6.1362E−02 −2.8260E−02  6.7391E−03 R12 −1.9982E+01  5.1764E−02 −4.4076E−02   9.2454E−03−7.1186E−04  −3.7346E−05 R13  3.0740E+00 −1.8247E−01 7.5021E−02−1.5531E−02 1.3067E−03 −4.1964E−05 R14  7.0837E−01 −1.6219E−018.0661E−02 −2.7541E−02 6.0759E−03 −8.3143E−04 Aspheric surfacecoefficients A14 A16 A18 A20 R1 2.3480E−02 1.1505E−02 2.9422E−03−7.0253E−03 R2 1.1798E−01 7.1886E−02 7.6977E−03 −1.3706E−01 R3−6.2949E−03  1.7708E−01 1.3436E−01 −2.1497E−01 R4 1.5908E−01−1.6626E−01  −1.4930E−01   8.7805E−02 R5 5.9596E−02 4.2666E−02−7.5690E−02   3.0140E−02 R6 1.2778E−01 2.6891E−02 4.6283E−02 −2.8542E−02R7 7.5360E−03 6.8018E−03 −8.4079E−04  −7.2199E−03 R8 −1.1856E−02 6.9442E−03 9.8147E−07 −1.2759E−03 R9 1.5180E−02 2.7516E−03 −1.8306E−03  1.7309E−04 R10 −2.1719E−03  −4.4371E−05  −1.0066E−04   5.2092E−05 R11−3.9983E−04  −2.2431E−05  −2.3638E−05   4.1793E−06 R12 −1.1441E−05 −1.5611E−06  1.7631E−07  2.2455E−07 R13 −1.7595E−06  1.0709E−061.6957E−07 −3.8924E−08 R14 6.5537E−05 −2.7875E−06  7.7396E−08−2.3445E−09

Table 11 and Table 12 show design data inflexion points and arrestpoints of the respective lenses in the camera optical lens 30 accordingto Embodiment 3 of the present disclosure.

TABLE 11 Number(s) of Inflexion point Inflexion point Inflexion pointinflexion points position 1 position 2 position 3 P1R1 1 1.045 P1R2 10.935 P2R1 1 0.905 P2R2 2 0.915 0.985 P3R1 1 0.765 P3R2 3 0.775 0.8651.005 P4R1 1 0.565 P4R2 1 0.365 P5R1 2 0.295 1.195 P5R2 2 0.875 1.295P6R1 1 0.815 P6R2 2 0.805 1.945 P7R1 2 0.325 2.085 P7R2 1 0.395

TABLE 12 Number of arrest points Arrest point position 1 P1R1 0 P1R2 0P2R1 0 P2R2 0 P3R1 1 1.045 P3R2 0 P4R1 1 0.925 P4R2 1 0.885 P5R1 0 P5R20 P6R1 1 1.395 P6R2 1 1.375 P7R1 1 0.595 P7R2 1 0.765

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 436 nm, 486 nm, 546 nm, 588 nm and656 nm after passing the camera optical lens 30 according to Embodiment3. FIG. 12 illustrates a field curvature and a distortion of light witha wavelength of 546 nm after passing the camera optical lens 30according to Embodiment 3.

Table 13 in the following lists values corresponding to the respectiveconditions in an embodiment according to the above conditions.Obviously, the embodiment satisfies the above conditions.

In an embodiment, an entrance pupil diameter of the camera optical lensis 2.105 mm, an image height of 1.0H is 3.4 mm, an FOV (field of view)in the diagonal direction is 89.69°. Thus, the camera optical lens has awide-angle and is ultra-thin. Its on-axis and off-axis aberrations arefully corrected, thereby achieving excellent optical characteristics.

TABLE 13 Parameters and conditions Embodiment 1 Embodiment 2 Embodiment3 f 3.683 4.079 3.367 f1 5.568 8.792 8.413 f2 23.229 7.096 5.944 f3−7.186 −9.918 −20.887 f4 3.596 24.651 −10.448 f5 −9.265 35.531 −1.496 f69.592 12.138 1.178 f7 −6.220 −5.504 −35.295 f12 4.530 4.105 3.754 FNO1.60 1.60 1.60 f1/f 1.51 2.16 2.50 n1 1.71 1.81 2.12 f3/f4 −2.00 −0.402.00 (R13 + R14)/ 2.50 2.69 10.01 (R13 − R14) n7 1.71 1.81 2.12

It can be appreciated by one having ordinary skill in the art that thedescription above is only embodiments of the present disclosure. Inpractice, one having ordinary skill in the art can make variousmodifications to these embodiments in forms and details withoutdeparting from the scope of the present disclosure.

What is claimed is:
 1. A camera optical lens comprising, from an objectside to an image side: a first lens; a second lens; a third lens; afourth lens; a fifth lens; a sixth lens; and a seventh lens; wherein thecamera optical lens satisfies following conditions:1.51≤f1/f≤2.50;1.70≤n1≤2.20;−2.00≤f3/f4≤2.00;−3.88≤f4/f≤7.25;−2.69≤(R7+R8)/(R7−R8)≤5.62;0.05≤d7/TTL≤0.13;2.50≤(R13+R14)/(R13−R14)≤10.01; and1.70≤n7≤2.20; where f denotes a focal length of the camera optical lens;f1 denotes a focal length of the first lens; f3 denotes a focal lengthof the third lens; f4 denotes a focal length of the fourth lens; n1denotes a refractive index of the first lens; n7 denotes a refractiveindex of the seventh lens; R7 denotes a curvature radius of theobject-side surface of the fourth lens; R8 denotes a curvature radius ofan image-side surface of the fourth lens; d7 denotes an on-axisthickness of the fourth lens; R13 denotes a curvature radius of anobject-side surface of the seventh lens; and R14 denotes a curvatureradius of an image-side surface of the seventh lens.
 2. The cameraoptical lens according to claim 1 further satisfying followingconditions:1.71≤n1≤2.16; and1.71≤n7≤2.16.
 3. The camera optical lens according to claim 1, whereinthe first lens has a positive refractive power, and comprises anobject-side surface being convex in a paraxial region and an image-sidesurface being concave in the paraxial region; and the camera opticallens further satisfies following conditions:−12.49≤(R1+R2)/(R1−R2)≤−1.62; and0.03≤d1/TTL≤0.11; where R1 denotes a curvature radius of the object-sidesurface of the first lens; R2 denotes a curvature radius of theimage-side surface of the first lens; d1 denotes an on-axis thickness ofthe first lens; and TTL donates a total optical length from an objectside surface of the first lens to an image surface of the camera opticallens along an optical axis.
 4. The camera optical lens according toclaim 3 further satisfying following conditions:−7.81≤(R1+R2)/(R1−R2)≤−2.03; and0.05≤d1/TTL≤0.09.
 5. The camera optical lens according to claim 1,wherein the second lens has a positive refractive power and comprises anobject-side surface being convex in a paraxial region; and the cameraoptical lens further satisfies following conditions:0.87≤f2/f≤9.46;−4.01≤(R3+R4)/(R3−R4)≤0.21; and0.05≤d3/TTL≤0.19; where f2 denotes a focal length of the second lens; R3denotes a curvature radius of the object-side surface of the secondlens; R4 denotes a curvature radius of an image-side surface of thesecond lens; and d3 denotes an on-axis thickness of the second lens. 6.The camera optical lens according to claim 5 further satisfyingfollowing conditions:1.39≤f2/f≤7.57;−2.51≤(R3+R4)/(R3−R4)≤0.17; and0.08≤d3/TTL≤0.15.
 7. The camera optical lens according to claim 1,wherein the third lens has a negative refractive power, and the cameraoptical lens further satisfies following conditions:−12.41≤f3/f≤−1.30;−18.01≤(R5+R6)/(R5−R6)≤5.53; and0.02≤d5/TTL≤0.07; where R5 denotes a curvature radius of an object-sidesurface of the third lens; R6 denotes a curvature radius of animage-side surface of the third lens; d5 denotes an on-axis thickness ofthe third lens.
 8. The camera optical lens according to claim 7 furthersatisfying following conditions:−7.75≤f3/f≤−1.63;−11.26≤(R5+R6)/(R5−R6)≤4.42; and0.03≤d5/TTL≤0.06.
 9. The camera optical lens according to claim 1,wherein the fifth lens has a refractive power, and comprises anobject-side surface being concave in a paraxial region and an image-sidesurface being convex in the paraxial region; and the camera optical lensfurther satisfies following conditions:−5.03≤f5/f≤13.07;−11.35≤(R9+R10)/(R9−R10)≤23.88; and0.02≤d9/TTL≤0.12; where f5 denotes a focal length of the fifth lens; R9denotes a curvature radius of the object-side surface of the fifth lens;R10 denotes a curvature radius of the image-side surface of the fifthlens; d9 denotes an on-axis thickness of the fifth lens.
 10. The cameraoptical lens according to claim 9 further satisfying followingconditions:−3.14≤f5/f≤10.45;−7.09≤(R9+R10)/(R9−R10)≤19.10; and0.04≤d9/TTL≤0.10.
 11. The camera optical lens according to claim 1,wherein the sixth lens has a positive refractive power, and comprises anobject-side surface being convex in a paraxial region and an image-sidesurface being concave in the paraxial region, and the camera opticallens further satisfies following conditions:0.17≤f6/f≤4.46;−13.67≤(R11+R12)/(R11−R12)≤−2.10; and0.04≤d11/TTL≤0.15; where f6 denotes a focal length of the sixth lens;R11 denotes a curvature radius of the object-side surface of the sixthlens; R12 denotes a curvature radius of the image-side surface of thesixth lens; d11 denotes an on-axis thickness of the sixth lens.
 12. Thecamera optical lens according to claim 11 further satisfying followingconditions:0.28≤f6/f≤3.57;−8.55≤(R11+R12)/(R11−R12)≤−2.62; and0.07≤d11/TTL≤0.12.
 13. The camera optical lens according to claim 1,wherein the seventh lens has a negative refractive power, and comprisesan object-side surface being convex in a paraxial region and animage-side surface being concave in the paraxial region, and the cameraoptical lens further satisfies following conditions:−20.97≤f7/f≤−0.90; and0.06≤d13/TTL≤0.20; where f7 denotes a focal length of the seventh lens;d13 denotes an on-axis thickness of the seventh lens.
 14. The cameraoptical lens according to claim 13 further satisfying followingcondition:−13.10≤f7/f≤−1.12; and0.10≤d13/TTL≤0.16.
 15. The camera optical lens according to claim 1,where a total optical length TTL from the object-side surface of thefirst lens to an image surface of the camera optical lens along anoptical axis is less than or equal to 5.99 mm.
 16. The camera opticallens according to claim 15, wherein the total optical length TTL of thecamera optical lens is less than or equal to 5.72 mm.
 17. The cameraoptical lens according to claim 1, wherein an F number of the cameraoptical lens is less than or equal to 1.65.
 18. The camera optical lensaccording to claim 17, wherein the F number of the camera optical lensis less than or equal to 1.62.